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Commit | Line | Data |
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9b9a3f20 MY |
1 | # SPDX-License-Identifier: GPL-2.0-only |
2 | # =========================================================================== | |
3 | # Module final link | |
4 | # =========================================================================== | |
5 | ||
6 | PHONY := __modfinal | |
7 | __modfinal: | |
8 | ||
5f9ae91f | 9 | include include/config/auto.conf |
9b9a3f20 MY |
10 | include $(srctree)/scripts/Kbuild.include |
11 | ||
b1a1a1a0 | 12 | # for c_flags and objtool_args |
9b9a3f20 MY |
13 | include $(srctree)/scripts/Makefile.lib |
14 | ||
15 | # find all modules listed in modules.order | |
16 | modules := $(sort $(shell cat $(MODORDER))) | |
17 | ||
18 | __modfinal: $(modules) | |
19 | @: | |
20 | ||
eb27ea5c | 21 | # modname and part-of-module are set to make c_flags define proper module flags |
9b9a3f20 | 22 | modname = $(notdir $(@:.mod.o=)) |
eb27ea5c | 23 | part-of-module = y |
9b9a3f20 MY |
24 | |
25 | quiet_cmd_cc_o_c = CC [M] $@ | |
cf68fffb | 26 | cmd_cc_o_c = $(CC) $(filter-out $(CC_FLAGS_CFI), $(c_flags)) -c -o $@ $< |
9b9a3f20 MY |
27 | |
28 | %.mod.o: %.mod.c FORCE | |
29 | $(call if_changed_dep,cc_o_c) | |
30 | ||
31 | ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink) | |
32 | ||
dc5723b0 ST |
33 | ifdef CONFIG_LTO_CLANG |
34 | # With CONFIG_LTO_CLANG, reuse the object file we compiled for modpost to | |
35 | # avoid a second slow LTO link | |
36 | prelink-ext := .lto | |
b1a1a1a0 ST |
37 | |
38 | # ELF processing was skipped earlier because we didn't have native code, | |
39 | # so let's now process the prelinked binary before we link the module. | |
40 | ||
41 | ifdef CONFIG_STACK_VALIDATION | |
b1a1a1a0 ST |
42 | cmd_ld_ko_o += \ |
43 | $(objtree)/tools/objtool/objtool $(objtool_args) \ | |
44 | $(@:.ko=$(prelink-ext).o); | |
45 | ||
b1a1a1a0 ST |
46 | endif # CONFIG_STACK_VALIDATION |
47 | ||
48 | endif # CONFIG_LTO_CLANG | |
dc5723b0 | 49 | |
9b9a3f20 | 50 | quiet_cmd_ld_ko_o = LD [M] $@ |
b1a1a1a0 | 51 | cmd_ld_ko_o += \ |
9b9a3f20 MY |
52 | $(LD) -r $(KBUILD_LDFLAGS) \ |
53 | $(KBUILD_LDFLAGS_MODULE) $(LDFLAGS_MODULE) \ | |
596b0474 | 54 | -T scripts/module.lds -o $@ $(filter %.o, $^); \ |
9b9a3f20 MY |
55 | $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true) |
56 | ||
5f9ae91f | 57 | quiet_cmd_btf_ko = BTF [M] $@ |
e732b538 AN |
58 | cmd_btf_ko = \ |
59 | if [ -f vmlinux ]; then \ | |
ff2e6efd | 60 | LLVM_OBJCOPY="$(OBJCOPY)" $(PAHOLE) -J --btf_base vmlinux $@; \ |
e732b538 AN |
61 | else \ |
62 | printf "Skipping BTF generation for %s due to unavailability of vmlinux\n" $@ 1>&2; \ | |
63 | fi; | |
5f9ae91f AN |
64 | |
65 | # Same as newer-prereqs, but allows to exclude specified extra dependencies | |
66 | newer_prereqs_except = $(filter-out $(PHONY) $(1),$?) | |
67 | ||
68 | # Same as if_changed, but allows to exclude specified extra dependencies | |
69 | if_changed_except = $(if $(call newer_prereqs_except,$(2))$(cmd-check), \ | |
70 | $(cmd); \ | |
71 | printf '%s\n' 'cmd_$@ := $(make-cmd)' > $(dot-target).cmd, @:) | |
72 | ||
dc5723b0 | 73 | |
5f9ae91f | 74 | # Re-generate module BTFs if either module's .ko or vmlinux changed |
dc5723b0 | 75 | $(modules): %.ko: %$(prelink-ext).o %.mod.o scripts/module.lds $(if $(KBUILD_BUILTIN),vmlinux) FORCE |
5f9ae91f AN |
76 | +$(call if_changed_except,ld_ko_o,vmlinux) |
77 | ifdef CONFIG_DEBUG_INFO_BTF_MODULES | |
78 | +$(if $(newer-prereqs),$(call cmd,btf_ko)) | |
79 | endif | |
9b9a3f20 MY |
80 | |
81 | targets += $(modules) $(modules:.ko=.mod.o) | |
82 | ||
83 | # Add FORCE to the prequisites of a target to force it to be always rebuilt. | |
84 | # --------------------------------------------------------------------------- | |
85 | ||
86 | PHONY += FORCE | |
87 | FORCE: | |
88 | ||
89 | # Read all saved command lines and dependencies for the $(targets) we | |
90 | # may be building above, using $(if_changed{,_dep}). As an | |
91 | # optimization, we don't need to read them if the target does not | |
92 | # exist, we will rebuild anyway in that case. | |
93 | ||
94 | existing-targets := $(wildcard $(sort $(targets))) | |
95 | ||
96 | -include $(foreach f,$(existing-targets),$(dir $(f)).$(notdir $(f)).cmd) | |
97 | ||
98 | .PHONY: $(PHONY) |